Effect of Light Levels on Growth, Survival and Skin Colour Enhancement of Marine Angelfish, Apolemichthys xanthurus (Bennett, 1833)
2017
Rajeswari, Mayavan Veeramuthu | Rajasree, Santha Ravindranath Radhika | Balasubramanian, Thangavel
In the present study, effect of various levels light on growth performances and skin colour enhancement of marine smoke angelfish Apolemichthys xanthurus was investigated. The fishes were reared in tanks with three different levels (250 500, 750 - 1000, and 1500 - 2000 lux) and control (without additional light) for 120 days and the growth, survival and carotenoid content were investigated. The results of the growth performances studies suggested that the fishes reared under low light level (250-500 lux) exhibited higher weight gain (73.90±0.06), specific growth rate (0.616±0.01), and survival rate (90%) and feed conversion ratio (1.00±0.01). The colour enhancement studies suggested that the carotenoid content of the fishes reared under low, medium, high and control was about 6.84±0.03, 6.19±0.04, 5.48±0.06 and 3.57±0.04 mg g-1 respectively. Thus, the result obtained from the present study indicates that the low light level (250-500 lux) was more suitable for better growth and skin colour enhancement of Apolemichthys xanthurus which could be recommended for the successive production of this high priced species.
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